Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasing-requirements-00.txt
Mark Andrews <marka@isc.org> Thu, 03 March 2011 21:31 UTC
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To: Tony Finch <dot@dotat.at>
From: Mark Andrews <marka@isc.org>
References: <20110227191542.6824.qmail@joyce.lan> <335963D7-3440-45E6-843C-38F419462792@cisco.com> <4D6C3FD3.7010801@ucd.ie> <302DAD77E927757D3DEA05DF@nimrod.local><alpine.LSU.2.00.1103031107460.14985@hermes-1.csi.cam.ac.uk> <20110303114148.A360FB98E2E@drugs.dv.isc.org> <alpine.LSU.2.00.1103031148130.14985@hermes-1.csi.cam.ac.uk> <20110303133541.C19B6B9E307@drugs.dv.isc.org> <alpine.LSU.2.00.1103031337570.14985@hermes-1.csi.cam.ac.uk> <20110303144600.11178B9E772@drugs.dv.isc.org> <alpine.LSU.2.00.1103031923050.14985@hermes-1.csi.cam.ac.uk>
In-reply-to: Your message of "Thu, 03 Mar 2011 19:39:26 -0000." <alpine.LSU.2.00.1103031923050.14985@hermes-1.csi.cam.ac.uk>
Date: Fri, 04 Mar 2011 08:31:45 +1100
Message-Id: <20110303213145.2B252B9FEA4@drugs.dv.isc.org>
Cc: Niall O'Reilly <Niall.oReilly@ucd.ie>, dnsext@ietf.org
Subject: Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasing-requirements-00.txt
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In message <alpine.LSU.2.00.1103031923050.14985@hermes-1.csi.cam.ac.uk>, Tony F inch writes: > On Fri, 4 Mar 2011, Mark Andrews wrote: > > > > It makes all the difference in the world. MX records DO NOT AND NEVER > > HAVE DEFINED FINAL DELIVER they have only ever defined the NEXT HOP. > > MX record define the inter-domain hop, which is where the mail crosses a > trust boundary, and where authentication is required. > > The other store-and-forward hops (from submission to outgoing border > relay; and from incoming border MX to final delivery or to alias > redirector) are within trust boundaries and so they are easier to > authenticate. > > > > TLS predates DNSSEC. > > > > Yes and it did not work securely because there was no way to validate > > the DNS responses. > > TLS doesn't try to validate the DNS responses, it verifies that you have > successfully connected to a server that can act for the domain you wanted > to reach. If TLS validation succeeds the DNS lookup must necessarily have > given you the right result. > > It isn't possible to use DNSSEC to secure a TCP connection to a server > because it doesn't verify that no-one has hijacked the IP address. I don't > know why you keep bringing it up. BECAUSE YOU CAN'T SECURE INTER SITE SMTP WITH OUT BOTH SECURING THE MX/A/AAAA LOOKUPS *AND* THE TCP CONNECTION THE SMTP TRANSACTION GOES OVER. > Note that these issues are not specific to SMTP: XMPP has similar > difficulties with s2s authentication. > > Tony. > -- > f.anthony.n.finch <dot@dotat.at> http://dotat.at/ > Sole, Lundy, Fastnet: Mainly northeasterly 4 or 5, occasionally 6 in Sole. > Slight or moderate, occasionally rough in Sole and Fastnet. Mainly fair. > Moderate or good. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org _______________________________________________ dnsext mailing list dnsext@ietf.org https://www.ietf.org/mailman/listinfo/dnsext
- [dnsext] I-D Action:draft-ietf-dnsext-aliasing-re… Internet-Drafts
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Suzanne Woolf
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Alex Bligh
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Ted Hardie
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Doug Barton
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Stephane Bortzmeyer
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Doug Barton
- Re: [dnsext] I-DAction:draft-ietf-dnsext-aliasing… George Barwood
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… John Levine
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Patrik Fältström
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Stephane Bortzmeyer
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Alex Bligh
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Paul Hoffman
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Dan Schlitt
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Paul Vixie
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Alex Bligh
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Alex Bligh
- [dnsext] How to bring discussion to a close (was:… Andrew Sullivan
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Niall O'Reilly
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Alex Bligh
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Stephane Bortzmeyer
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Niall O'Reilly
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Niall O'Reilly
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Alex Bligh
- Re: [dnsext] errata on RFC1034 for recursive alia… John Levine
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Niall O'Reilly
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Phillip Hallam-Baker
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Tony Finch
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Mark Andrews
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Tony Finch
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Tony Finch
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Mark Andrews
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Tony Finch
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Mark Andrews
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Phillip Hallam-Baker
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Tony Finch
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Alex Bligh
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Mark Andrews
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Mark Andrews
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Masataka Ohta
- [dnsext] errata on RFC1034 for recursive aliasing… Masataka Ohta
- Re: [dnsext] errata on RFC1034 for recursive alia… Mark Andrews
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Stephane Bortzmeyer
- Re: [dnsext] errata on RFC1034 for recursive alia… Andrew Sullivan
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Niall O'Reilly
- Re: [dnsext] errata on RFC1034 for recursive alia… Masataka Ohta
- Re: [dnsext] errata on RFC1034 for recursive alia… Andrew Sullivan
- Re: [dnsext] errata on RFC1034 for recursive alia… Paul Vixie
- Re: [dnsext] errata on RFC1034 for recursive alia… Masataka Ohta
- Re: [dnsext] errata on RFC1034 for recursive alia… Brian Dickson
- Re: [dnsext] errata on RFC1034 for recursive alia… Masataka Ohta
- [dnsext] pricing for equivalent localized domain … Masataka Ohta
- Re: [dnsext] pricing for equivalent localized dom… John Levine
- Re: [dnsext] errata on RFC1034 for recursive alia… Brian Dickson
- Re: [dnsext] pricing for equivalent localized dom… Masataka Ohta
- Re: [dnsext] errata on RFC1034 for recursive alia… Masataka Ohta
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Brian Dickson
- Re: [dnsext] I-D Action:draft-ietf-dnsext-aliasin… Doug Barton